extern int exam5_1();
extern int exam5_2();
extern int exam5_3();
extern int exam5_4();
extern int exam5_6();
extern int exam5_6_2();
extern int exam5_7();
extern int exam5_8();
extern int exam5_9();
extern int exam5_10();
extern int exam5_14();
extern int exam5_14_2();
extern int exam5_14_3();
extern int exam5_15();
extern int exam5_17();
extern int exam5_18();
extern int exam5_19();
extern int exam5_21();
extern int exam5_22();
extern int exam5_23();
extern int ex5_2_1();
extern int ex5_2_2();
extern int ex5_2_3();
extern int exam5_28();
extern int exam5_28_1();
extern int exam5_25();
extern int cou();
int main()
{
	//exam5_1();
	//exam5_2();
	//exam5_3();
	//exam5_4();
	//exam5_6();
	//exam5_6_2();
	//exam5_7();
	//exam5_8();
	//exam5_9();
	//exam5_10();
	//exam5_14();
	//exam5_14_2();
	//exam5_14_3();
	//exam5_15();
	//exam5_17();
	//exam5_18();
	//exam5_19();
	//exam5_21();
	//exam5_22();
	//exam5_23();
	//ex5_2_1();
	//ex5_2_2();
	//ex5_2_3();
	//exam5_28();
	//exam5_28_1();
	//exam5_25();
	cou();
	return 0;
}